Several triangle shaped objects soaring into different flight formations.

I was looking up at what I thought was an amazing display of birds starting in a heart formation, I watched as they soared into many other formations and began realizing one the formations were not in motion they were in one spot changing formations, as I continued to look closer I was confused because they were in a constant state of "soaring" upon looking closer it was apparent no wings were flapping and the formations were not in motion. I began calling out for my kids to look and ran back Into the house to retrieve my phone. When I returned the formations were in motion and leaving. Still no wings flapping. Triangle shaped, white, very high up, planes didn't seem to notice? I was able to get a little video.